The title "Prince of Portugal" historically refers to the heir apparent to the Portuguese throne. This title has been held by various members of the House of Aviz and later the House of Braganza, which ruled Portugal for centuries. The title signifies the individual who is first in line to become king, playing a crucial role in the royal lineage and governance of the country. In modern times, the title is largely ceremonial, as Portugal is now a republic and no longer has a monarchy. However, descendants of the former royal family, such as the current pretender, often retain the title in a cultural and historical context, representing Portugal's rich royal heritage.